Use Code OSS GitHub client id (#252426)

To separate Code OSS & VS Code.

extensions/github-authentication/src/config.ts

@@ -15,5 +15,5 @@ export interface IConfig {
 // not really a secret... so we allow the client secret in code. It is brought in before we publish VS Code. Reference:
 // https://docs.github.com/en/apps/oauth-apps/building-oauth-apps/best-practices-for-creating-an-oauth-app#client-secrets
 export const Config: IConfig = {
-	gitHubClientId: '01ab8ac9400c4e429b23'
+	gitHubClientId: 'a5d3c261b032765a78de'
 };